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Yandex Cloud Postbox
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In this article:

  • Address
  • Configuration
  • Sender
  • Subscription
  • DKIM signature
  1. Concepts
  2. Terms and definitions

Terms and definitions in Yandex Cloud Postbox

Written by
Yandex Cloud
Updated at July 23, 2026
View in Markdown
  • Address
  • Configuration
  • Sender
  • Subscription
  • DKIM signature

AddressAddress

An address is the domain emails are sent from. To send emails from any mailbox on the domain, you need to get your domain ownership confirmed.

To send emails from subdomains, add them as separate addresses. Yandex Cloud Postbox checks whether the sender’s email domain matches that specified in the address. For example, with yourdomain.com as your confirmed ownership domain, you can email from noreply@yourdomain.com or admin@yourdomain.com but not from user@mail.yourdomain.com.

ConfigurationConfiguration

A configuration is a group of rules you can apply to an outgoing email. A configuration may contain the following rules:

  • Getting email event notifications.
  • Configuring mandatory TLS encryption.
  • Collecting engagement statistics.

For more information, see Configuration.

SenderSender

A sender is a confirmed domain mailbox used to send emails. You can limit the list of allowed senders when creating or editing an address.

SubscriptionSubscription

A subscription is a destination for notifications about operations with emails.

DKIM signatureDKIM signature

A DKIM signature is a digital signature added to email headers to verify that the message originated from the specified domain and was not tampered with in transit. Without a properly configured DKIM signature, most email services will reject emails from Yandex Cloud Postbox or flag them as spam.

Yandex Cloud Postbox supports Easy DKIM and the advanced DKIM settings. For more information, see DKIM.

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